Intrinsic Absorption in the Spectrum of NGC 7469: Simultaneous Chandra, FUSE, and STIS Observations
We present simultaneous X-ray, far-ultraviolet, and near-ultraviolet spectra of the Seyfert 1 galaxy NGC 7469 obtained with the Chandra X-Ray Observatory, the Far Ultraviolet Spectroscopic Explorer, and the Space Telescope Imaging Spectrograph on the Hubble Space Telescope. Previous nonsimultaneous...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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IOP Publishing
2012
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| Online Access: | http://hdl.handle.net/1721.1/71915 https://orcid.org/0000-0002-5769-8441 |
| _version_ | 1811078029544259584 |
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| author | Scott, Jennifer E. Kriss, Gerard A. Lee, Julia C. Quijano, Jessica Kim Brotherton, Michael Canizares, Claude R. Green, Richard F. Hutchings, John Kaiser, Mary Elizabeth Oegerle, William Ogle, Patrick M. Zheng, Wei Marshall, Herman |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Scott, Jennifer E. Kriss, Gerard A. Lee, Julia C. Quijano, Jessica Kim Brotherton, Michael Canizares, Claude R. Green, Richard F. Hutchings, John Kaiser, Mary Elizabeth Oegerle, William Ogle, Patrick M. Zheng, Wei Marshall, Herman |
| author_sort | Scott, Jennifer E. |
| collection | MIT |
| description | We present simultaneous X-ray, far-ultraviolet, and near-ultraviolet spectra of the Seyfert 1 galaxy NGC 7469 obtained with the Chandra X-Ray Observatory, the Far Ultraviolet Spectroscopic Explorer, and the Space Telescope Imaging Spectrograph on the Hubble Space Telescope. Previous nonsimultaneous observations of this galaxy found two distinct UV absorption components, at -560 and -1900 km s[superscript -1], with the former as the likely counterpart of the X-ray absorber. We confirm these two absorption components in our new UV observations, in which we detect prominent O VI, Lyα, N V, and C IV absorption. In our Chandra spectrum we detect O VIII emission, but no significant O VIII or O VII absorption. We also detect a prominent Fe Kα emission line in the Chandra spectrum, as well as absorption due to hydrogen-like and helium-like neon, magnesium, and silicon at velocities consistent with the -560 km s[superscript -1] UV absorber. The FUSE and STIS data reveal that the H I and C IV column densities in this UV- and X-ray-absorbing component have increased over time, as the UV continuum flux decreased. We use measured H I, N V, C IV, and O VI column densities to model the photoionization state of both absorbers self-consistently. We confirm the general physical picture of the outflow in which the low-velocity component is a highly ionized, high-density absorber with a total column density of 1020 cm[superscript -2], located near the broad emission-line region, although due to measurable columns of N V and C IV, we assign it a somewhat smaller ionization parameter than found previously, U ~ 1. The high-velocity UV component is of lower density, log N = 18.6, and likely resides farther from the central engine, as we find its ionization parameter to be U = 0.08. |
| first_indexed | 2024-09-23T10:52:17Z |
| format | Article |
| id | mit-1721.1/71915 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:52:17Z |
| publishDate | 2012 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/719152022-09-27T15:34:06Z Intrinsic Absorption in the Spectrum of NGC 7469: Simultaneous Chandra, FUSE, and STIS Observations Scott, Jennifer E. Kriss, Gerard A. Lee, Julia C. Quijano, Jessica Kim Brotherton, Michael Canizares, Claude R. Green, Richard F. Hutchings, John Kaiser, Mary Elizabeth Oegerle, William Ogle, Patrick M. Zheng, Wei Marshall, Herman Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research Canizares, Claude R. Canizares, Claude R. Marshall, Herman Lee We present simultaneous X-ray, far-ultraviolet, and near-ultraviolet spectra of the Seyfert 1 galaxy NGC 7469 obtained with the Chandra X-Ray Observatory, the Far Ultraviolet Spectroscopic Explorer, and the Space Telescope Imaging Spectrograph on the Hubble Space Telescope. Previous nonsimultaneous observations of this galaxy found two distinct UV absorption components, at -560 and -1900 km s[superscript -1], with the former as the likely counterpart of the X-ray absorber. We confirm these two absorption components in our new UV observations, in which we detect prominent O VI, Lyα, N V, and C IV absorption. In our Chandra spectrum we detect O VIII emission, but no significant O VIII or O VII absorption. We also detect a prominent Fe Kα emission line in the Chandra spectrum, as well as absorption due to hydrogen-like and helium-like neon, magnesium, and silicon at velocities consistent with the -560 km s[superscript -1] UV absorber. The FUSE and STIS data reveal that the H I and C IV column densities in this UV- and X-ray-absorbing component have increased over time, as the UV continuum flux decreased. We use measured H I, N V, C IV, and O VI column densities to model the photoionization state of both absorbers self-consistently. We confirm the general physical picture of the outflow in which the low-velocity component is a highly ionized, high-density absorber with a total column density of 1020 cm[superscript -2], located near the broad emission-line region, although due to measurable columns of N V and C IV, we assign it a somewhat smaller ionization parameter than found previously, U ~ 1. The high-velocity UV component is of lower density, log N = 18.6, and likely resides farther from the central engine, as we find its ionization parameter to be U = 0.08. Chandra X-ray Observatory (U.S.) Fellowship Grant (PF2–30023) United States. National Aeronautics and Space Administration. (Smithsonian Astrophysical Observatory) (Contract Number NAS8–39073) 2012-07-31T16:02:47Z 2012-07-31T16:02:47Z 2005-11 2005-02 Article http://purl.org/eprint/type/JournalArticle 0004-637X 1538-4357 http://hdl.handle.net/1721.1/71915 Scott, Jennifer E. et al. “Intrinsic Absorption in the Spectrum of NGC 7469: Simultaneous Chandra,FUSE, and STIS Observations.” The Astrophysical Journal 634.1 (2005): 193–209. https://orcid.org/0000-0002-5769-8441 en_US http://dx.doi.org/10.1086/496911 Astrophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf IOP Publishing arVix |
| spellingShingle | Scott, Jennifer E. Kriss, Gerard A. Lee, Julia C. Quijano, Jessica Kim Brotherton, Michael Canizares, Claude R. Green, Richard F. Hutchings, John Kaiser, Mary Elizabeth Oegerle, William Ogle, Patrick M. Zheng, Wei Marshall, Herman Intrinsic Absorption in the Spectrum of NGC 7469: Simultaneous Chandra, FUSE, and STIS Observations |
| title | Intrinsic Absorption in the Spectrum of NGC 7469: Simultaneous Chandra, FUSE, and STIS Observations |
| title_full | Intrinsic Absorption in the Spectrum of NGC 7469: Simultaneous Chandra, FUSE, and STIS Observations |
| title_fullStr | Intrinsic Absorption in the Spectrum of NGC 7469: Simultaneous Chandra, FUSE, and STIS Observations |
| title_full_unstemmed | Intrinsic Absorption in the Spectrum of NGC 7469: Simultaneous Chandra, FUSE, and STIS Observations |
| title_short | Intrinsic Absorption in the Spectrum of NGC 7469: Simultaneous Chandra, FUSE, and STIS Observations |
| title_sort | intrinsic absorption in the spectrum of ngc 7469 simultaneous chandra fuse and stis observations |
| url | http://hdl.handle.net/1721.1/71915 https://orcid.org/0000-0002-5769-8441 |
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